# Sleep Calculator - Wake Up — Calculate bedtime, sleep cycle

> Calculate bedtime, sleep cycle (iPhone/iPad app by Tharindu Prabath.)

- Source: https://appshunter.io/ios/app/sleep-calculator-wake-up/id6744512529 (this page in markdown: same URL + `.md`)
- Developer: [Tharindu Prabath](https://appshunter.io/developer/1675338074)
- Category: Health & Fitness, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.6 · 13 MB
- Languages: American English
- Released: 2025-04-14
- Data updated: 2026-08-16
- User reviews in markdown: https://appshunter.io/ios/app/sleep-calculator-wake-up/id6744512529/reviews.md

## What is Sleep Calculator?

Your Brain Needs Good Sleep to Stay Healthy
Not getting enough quality sleep can really hurt your body and mind:

- Forgetfulness: 
Poor sleep messes with your memory and makes it harder to remember things.
- Brain Buildup:
When you don’t get deep sleep, harmful stuff can build up in your brain, which is linked to diseases like Alzheimer’s.
- Mood Swings:
Lack of sleep makes anxiety and depression worse, and faster.
- Faster Aging:
Even one bad night can make your body age quicker at the cellular level.
- Weight & Blood Sugar Problems:
Bad sleep confuses your body, making it harder to manage weight and blood sugar.

The science is clear
Your body requires complete 90-minute sleep cycles. Here's why that matters for your health:

- Sharper Brain:
Each full cycle helps your brain process memories, boost focus, and clear out mental fog.
- Deeper Recovery:
You only hit the most healing stages of sleep (like deep and REM) when you complete the full cycle.
- Balanced Hormones:
Full sleep cycles help regulate key hormones like cortisol, insulin, and melatonin, keeping your mood, metabolism, and energy in check.
- Stronger Immunity:
Completing cycles gives your immune system the time it needs to repair, recharge, and fight off illness.

This App Fixes What You're Doing Wrong
We Do the Math for Perfect Sleep

You Have Two Choices:

1. Continue bad sleep patterns and suffering the consequences
2. Let science optimize your sleep starting tonight

The difference between these choices determines whether you'll be sharp and healthy at 50... or forgetful, overweight, and chronically exhausted.

Download Now Before Another Night Damages Your Brain


Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://sites.google.com/view/sleep-calculator-wake-up/privacy-policy

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Sleep Calculator Premium | $2.99 | one-time |



## Version history (last 2 releases)

### 1.0.1 — 2025-04-21

Improved user experience

### 1.0.0 — 2025-04-14

No release notes.

## Apps similar to Sleep Calculator

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Circadian Rhythm: Body Clock](https://appshunter.io/ios/app/circadian-rhythm-body-clock/id6737418117) | 4.4 (7) | Free | Health & Fitness |
| [Quest: Sleep Better Tonight](https://appshunter.io/ios/app/quest-sleep-better-tonight/id6737062642) | 4.9 (152) | Free | Health & Fitness |
| [Smart Sleep Calculator](https://appshunter.io/ios/app/smart-sleep-calculator/id6744327999) | — | Free | Health & Fitness |
| [Lune: Bedtime Sleep Routine](https://appshunter.io/ios/app/lune-bedtime-sleep-routine/id6478384948) | 3.8 (193) | Free | Health & Fitness |
| [Rise — Sleep Companion](https://appshunter.io/ios/app/rise-sleep-companion/id6451386327) | — | Free | Health & Fitness |
| [BetterSleep: Relax and Sleep](https://appshunter.io/ios/app/bettersleep-relax-and-sleep/id314498713) | 4.7 (390,587) | Free | Health & Fitness |

## More apps by Tharindu Prabath

- [Transcribe AI: Voice to Text](https://appshunter.io/ios/app/transcribe-ai-voice-to-text/id6451265628)
- [AIDA: Grammar Check Corrector](https://appshunter.io/ios/app/aida-grammar-check-corrector/id6705131596)
- [Bible Chat - Noah](https://appshunter.io/ios/app/bible-chat-noah/id6741835504)
- [Sip AI: Cocktail Recipes](https://appshunter.io/ios/app/sip-ai-cocktail-recipes/id6746666484)

All apps by Tharindu Prabath: https://appshunter.io/developer/1675338074

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-16.*